When Blizzard said they were going to use real names on their forums I posted about my disagreement with it...no profanity, nothing vulgar, just a post. They banned me for it.
I canceled my account and to this day they send me resubscribe offers that actually mention their "real names" idea. It's like "We know you quit over our plan to use real names but we aren't doing that now so please come back!"...but they deleted my forum post and banned me about it.